[17.21] Accretion-EJection Instability: new results on QPOs

The Accretion-Ejection Instability has been proposed has
been proposed to explain the low frequency Quasi-Periodic
Oscillation (QPO) observed in low-mass X-Ray Binaries, in
particular Black-Hole candidates. Its frequency, typically a
fraction of the Keplerian frequency at the disk inner
radius, is exactly in the range indicated by observations.
We will show how this instability is able to produce a
modulation of the X-ray flux and what are the characteristic
of this modulation.